Home / 13,981.20-19,297.86-8,243.70

Finding the Fourth Proportional to 13,981.20, 19,297.86 and 8,243.70

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Solution

The fourth proportional to 13,981.20, 19,297.86 and 8,243.70 is: 11,378.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,981.20 : 19,297.86 = 8,243.70 : x
  2. Step 2: Convert to fraction form
    13,981.20/19,297.86 = 8,243.70/x
  3. Step 3: Cross multiply
    13,981.20x = 19,297.86 × 8,243.70
  4. Step 4: Simplify right side
    13,981.20x = 159,085,768.48
  5. Step 5: Solve for x
    x = 159,085,768.48/13,981.20
  6. Step 6: Final answer
    x = 11,378.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.